Explosive-engine.



J; H. PITCH. EXPLOSIVE ENGINE., APPLICATION FILED OUT. 28, 1909.

Patnted 0013.4,1910.

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J. H. FITCH. EXPLOS IVE ENGINE.

APPLICATION FILED OUT. 28, 1909. 972,071, Patented Oct. 4,1910.

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gym-M I CI/H'mm J. H. FITCH. EXPLOSIVE ENGINE. APPLICATION FILED 001'. 28, 1909. 972,0 71 Patented 0013.4,1910.

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J14 cute 1 J. H'. F ITGH. EXPLOSIVE ENGINE.

APPLICATION FILED 00128, 1909. 972,071, PatentedDctA, 1910.

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Tooll 'whom it may concern: Be it known that I, JOHN H. FrroH, a citizen of the United States, residing at Liidington, countyiof Mason, and State of h'lichigan, have inventedcertain new and useful Improvements in Explosive-Engines,

- of which the following a specification.

My nventionrelates to mprovements in tion of the opposite side of said engine, Fig.

3 a vertical transverse section of said engine, Fig. 4:, a vertical section, partially in elevation, showing the valve employed in the engine, and Fig. 5, apartial section on line Eza-w of .Fig- 1.

In the preferred form of construction, as illustrated in the drawings the engine shaft 1 is rotatably mounted in a suitable cdsing 2. lasing 2 is formed intwo partsbolted together to inclose an annular cylinder Within casing '2 a hub 4 is keyed to shaft 1. and-carries a circular disk operating between the parts of said casing. At one .point on its periphery plate 5 is provided with a cylindilical lug or projection (l to which a. cylindrical piston 7, adapted to operate in cylinder is secured. intersecting cylinder 3. and mounted in casing 2, is a rotary valve 8 provided with an opening t adapted to register with and form a smooth continuation of the bore of the cylinder 3. By this arrangement it will be seen that the valve 8 will be so set as to permit the pa sage of piston 7 through it. as indicated in Fi 3 or to h ve the opening 9 serve as an exhaust for cyl der 3. as indicated in]? QEXPnOsIVE-ENGIQNE.

=1 Specification of Letters Patent.

'4. The valve S'is also provided with an admission chamber 10 having a threaded plug 11 carrying a check valve 12 atone end i and a port 13 at one side. By

ment When valve 8 is in position to exhaust cylinder 8 the port 13 is in position to admit to the other side of cylinder 3 from chamber 10. A spring-held plate 14 is also provided this arrange- Jenn is. "siren, or LUnINe'roiv, IMI'IQHHIGAN.

Patented Oct. 4, 1910.

Applicationiiled October as, 1909. Serial No. 525,032.

in valve 8 to prevent leakage past the edge of plate 5.

At one end the valve 8 is provided with a stud shaft 15 projecting-through the wall of easing 2- and carrying a segmental gear 16 keyed to its outer end. Segmental gear 16 meshes with another segmental gear 17 carried by the arm 18 which is pivoted at its outer end on a stud 19secured in casing 2; Atits inner end armf18 carries a. segmental arm 20 adapted to'contact with a pin 21 carried by a plate 22 fixed to shaft 1. A spri1ig23 attached at one end to arm 18 and at its other end to "casing 2'is adapted to yieldingly hold said arm in contact with a pin Zion casing \Vhen arm- '18 contacts with pin 24- valve 8 is position illustrated in Fig. -1 and cyliuderl is exhaustingf. As shaft. 1 and plate 22 rotate pil'i 'fi'l contacts with the "inner end of arn'i EZOand rocks valve 8 to bring opening 9 to register with cylinder 3 so asto permitthepassage of lug G and piston 7 therethrough, the said valve being held in proper position whilep'in' 21 travels along the inneifiiii'cularface 20' of arm 20. During this action the lug'tiiand piston Tpass through the opening- 9 whereupon. the "pin 21 running from under arm 9.0 permits the return ofthe valve to original. or exhaus ing position.

At the opposite side of casing is secured a compression cylinder 25 in whicho'pe'rates a compression piston 26 carried by a connecting rod 27 pivoted to the end of a lever 28. The lever 28 is 't'ulcrun'ied on a stud 25 carried by a. standard 30 secured to casing i At its middle, lever 28 is connected with a link 31 operated by eccentric 32 011 shaft 1. In a slot 33 in the end of cylinder 25 is pivoted. a lever 84.- having one end adapted to contact with the end of piston. 26 at the compression end of its stroke. At its other end lever 31 carries a valve 35ladapted to close a port 36 leading from cylinder 25. A spring 15? serves to yieldingly hold valve 35 to its seat and to place the end of lever 34 in the path of the end ofpiston 26, all as illustrated in Fig. A threaded opening 38 is provided in the wall of cylinder 25 and in which :1 suit-able pipe containing a check valve may be securedtoconnect said cylinder with a carburetor. By this construction itvvill be seen that as shaft 1 rotates a charge will be drawn into cylinder 25 and compressed therein until the end of piston 26 contacting with lever 34 raisesvalve 35 and permits theescape of said chargethro'ugh port 36. Port 36 communicates with. the endof valve 8 in such .position as to register with plu 11- when valve 8 is in position shown in Flg. 4'. Thus the charge escaping from cylinder is permitted to .enter chamber'IO and thence pass into cylinder- 3 immediately behind piston 7. Cylinder 25 carries an adjustable contact point 39 adaptedto cooperate with'a similarpoint 40 on lever 28 to close an elec- I tric, circuit through-spark plug 41 when the piston 26 reaches the end of its compressive the'appended claims.-

stroke and afull charge has been forced into cylinder 3 behind piston 7. This explodes the'charge behind piston 7 thus causing the operation of said piston to continue the rotations of shaft 1. v I

By this construction it will be seen that a simple and efiective means are provided for operating the engine and supplying it with explosive charge.

While I have illustrated and described the preferred form of construction, this is capable of variations or modifications without departing from-the spiritof my invention. I therefore do not wish to be limited to the exact details of construction set forth but desire to avail myself of such variationsand modifications as come within the'scope of' exhaust port, and an admission port; an inwardly' rejecting arm connected with said valve, t c said arm being provided at its inner end with a segmental armya spring 45 for y1eld1ngly holdingsaid valve in exhaustmg position; and a Pi mounted upon said -eng1ne shaft and adaptedto engage said arm to rotate said valve to a position to permitthe passage of sald piston, and said 'segb0 mental arm to momentarily hold said valve in this position to 'ermit the assage of said pistomsubstantial y as described.

2. In an explosive engine, the combination 'ofa'casing provided with an annular engine cylinder t erein; an en ine shaft; a' revolvmg p ston in said cy mder and mounted upon said engine shaft; a rotary valve inter-- secting said cylinder androvided with an openlng adapted to permit the assage of '60 said piston and to serve as an ex aust port and an admission -port;'means for operating said valve, a' compression piston and cylin-- der adjacent saiden ine cylinder and pro-' vided with a port. a aptcd to conngct with 65 said admission port; apressure' seated valve closing said compression 'cylinder ort; a spring-held lever for operating sai valve and arrangedto beoperated by the}- piston at-thecompression end of'its stroke, a s'egmental gear carried by said rotary valve; a spring-held arm pivoted to said casing and carrying a segmental gear meshing wit said first mentioned segmental gear; and a pin carried by said engine shaft and ad pted to '15 engage said arm to o erate'saidva e, substantially as describe In testimony-whereof I'have signed my name to this specification in the presence of two subscribing witnesses.

JOHN-H. FITCH, W tnesses R. R. 'WHEELEB, J ossrn W.. SrruLL. 

